历史上最大的交易被黑事件。

I will list here some such hacking attacks

Poloniex (2014)
The founder of Poloniex, Tristan D'Agosta, did not have much business experience before he started. He was an independent writer and musician. The exchange had - as it turned out - some gaps in the code and payment system. As a result, it lost 65 thousand USD in cryptovalots.

Cryptsy (2014)
Cryptsy lost USD 9.5 million. The attack took place in 2014, but more details appeared only two years later, when the exchange revealed that it was insolvent.

Cryptsy was finally closed in 2016. At that time, its former clients filed a class action suit. In July 2017, County Judge Kenneth Marra issued a verdict ordering the return of funds to users.

BTER (2014)
This time we are talking about a loss of USD 1.65 million.

The Chinese  exchange BTERA has lost more than one million dollars in altcoin NXT. BTER was thinking for a while about recovering the stolen funds by reversing the NXT transaction, but exchange eventually decided not to pursue this idea.

KipCoin (2014)
This time we are talking about a "small" loss, only $690,000.

The Chinese stock exchange KipCoin claimed to have been attacked by hackers. Sceptics suggested that from the beginning it was a platform that operated as a financial pyramid. Unfortunately, the case was not clarified. The exchange disappeared from the network.

BitPay (2014)

A hacker who stole more than $1.8 million worth of cryptoes from BitPay used a cunning phishing attack. He deceived Bryan Krohn, BitPay's CFO. He persuaded him by trickery to change his email password. Once the hacker had access to Krohn's email, he sent a series of requests to BitPay president Stephen Pairo. Shockingly enough, he thoughtlessly sent a BTC hacker worth nearly 2 million. USD.

Bitstamp (2015)
Bitstamp's hack from 2015 resembles the 2014 BitPay attack. In both cases, hackers gained access to confidential credentials. However, the Bitstamp attack was slightly more sophisticated. The hackers used Skype and e-mail to convince the stock exchange employees to download malware. In this way they stole $5.2 million.

In 2020, the world has changed. After the initial shock of the pandemic and the collapse of the markets, people have started to adjust to the new isolating reality. One of the major changes in everyday life was the massive shift to remote working. Remote working has led to an increase in cybercrimes. The upward trend is expected to continue in the near future. The cryptocurrency community and companies have been targeted by hackers since the very beginning. Unfortunately, hacking cryptocurrency exchanges and wallets is not new to the industry. But this year, amidst the boom, DeFi projects have become a favourite target for hackers. By November, attackers had stolen nearly $100 million from DEFI protocols.

The biggest hack of the year was the attack on cryptocurrency exchange KuCoin. KuCoin is one of the biggest hacks in history. The losses amounted to $280 million.
DeFi protocols were the most frequently attacked in 2020.
In addition to hacking protocols and platforms, cybercriminals actively traded user data.
By November, KuCoin had returned most of the stolen funds to users and restored deposits and asset withdrawals .

In April, a hacker attacked the dForce DeFi protocol. At the time of the theft, the stolen amount was almost $25 million.

As it turned out, the hacker exploited an ERC-777 security vulnerability in the imBTC token and a critical vulnerability in the Lendf.me platform's smart contracts, which are responsible for updating user balances. In addition to the damage caused by dForce, the hacker withdrew all tokens from Lendf.me.

However, the attacker made a fatal mistake - he inadvertently revealed his identity by contacting the decentralised exchanges directly without using the IPFS distributed file system.

As a result, Singaporean law enforcement officers became interested in the hacker and he had to return all the stolen funds.

Yes, there have been several high-profile exchange hacks since the MT.GOX incident. Here are some of the biggest exchange hacks in history: MT.GOX: In 2014, MT.GOX, once the largest Bitcoin exchange, filed for bankruptcy after losing 850,000 Bitcoins valued at around $473 million at the time. Coincheck: In 2018, Japanese exchange Coincheck was hacked and $530 million worth of NEM was stolen. Binance: In 2019, Binance, one of the largest cryptocurrency exchanges, disclosed a hack where hackers stole 7,000 Bitcoins valued at around $40 million. KuCoin: In 2020, KuCoin suffered a hack resulting in the loss of $281 million worth of various cryptocurrencies. These incidents serve as a reminder of the importance of security measures in the cryptocurrency exchange industry.